No high-precision AF at and above f/2.8, Plastic build, a bit too small.

I've been using it for just about a year now and I've never had any problems with it. It's a fantastic little camera, and coupled with the battery grip, it makes an excellent companion to shoot with. The quiet shutter, compatibility with all EF and EF-S lenses are an added plus. I wish the AF could be faster, and the build could be better, at times - but you get what you pay for.

No focus limiter, can hunt in very low light, hood is impossible to find.

I got this lens a few days ago, and it's a real gem. Unlike many macro lens offerings from Canon or other brands, this lens focuses fast and almost always accurately. 60mm is a great length on crop cameras (96mm FOV equiv.) for a lot of things including portraits, street candids, macro shooting and even weddings and events - and this lens absolutely shines in every one of them. At f/2.8 it's on the verge of being too sharp to accept any further post-sharpening in Photoshop. 100% crops of the picture look no worse than when resized. At f/4, it has barely any improvement from f/2.8, and the lens holds a similar sharpness down to f/16. The only aperture to be avoided is f/32, which is spoiled by diffraction.
Although the working distance is a bit close for bug work, the lens is a great and versatile macro performer. Full-Time manual focus makes possible the easy fine-tuning of focus for moving subjects.

The lens is solidly built, with no moving parts, and a very smooth Focusing ring. With a bit more strengthening, a red line and weather sealing, it could easily be an L lens. Another plus is that the lens is very light, and small enough to fit in the front pocket of your bag.

It is EF-S, which may be a drawback for some, but if you want a full-frame Macro, the 100mm Macro comes just about to the same FOV as this lens anyway.